| abstract |
A light source assembly with default safety function includes a laser source, an optical splitter, a fluorescent layer, an optical-electrical converter, and a voltage controller. The optical splitter has first solid portion, a second solid portion, and an optical transition. The fluorescent layer can absorb a laser and convert it into visible light. The optical-electrical converter receives a portion of the visible light and converts it into an electrical signal. The voltage controller applies a voltage to the optical splitter when no electrical signal converted from visible light is received. Refractive indexes of the first and second solid portions are equal when no voltage is applied to the optical splitter but refractive index of the first solid portion increases when voltage is applied to the optical splitter, thereby causing total reflection of the laser beam. |